CN107271049A - A kind of apparatus and method for measuring HTHP mixed gas radiation characteristic - Google Patents
A kind of apparatus and method for measuring HTHP mixed gas radiation characteristic Download PDFInfo
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- CN107271049A CN107271049A CN201710554449.6A CN201710554449A CN107271049A CN 107271049 A CN107271049 A CN 107271049A CN 201710554449 A CN201710554449 A CN 201710554449A CN 107271049 A CN107271049 A CN 107271049A
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
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Abstract
The invention discloses a kind of device for being used to measure mixed gas radiation characteristic under high-temperature and high-pressure conditions, mainly it is made up of air supply system, heating system, pumped vacuum systems, measuring system, the part of experimental data acquisition and memory system five.Air supply system includes：Gas cylinder, pressure reducer, check valve, steam evaporator, and blender.Heating system includes：Gas preheater, mixed gas preheater, heating furnace.Measuring system includes：Laser, fibre-optical probe, optical signal receiver, spectrometer, experimental section.Experimental data acquisition and memory system includes：Temperature sensor, pressure transmitter, flow controller, NI data collecting instruments.
Description
Technical field
The present invention relates to a kind of apparatus and method for measuring HTHP mixed gas radiation characteristic, it can be used for research not
The radiation characteristic of gas under the conditions of synthermal, pressure, component.
Background technology
The radiance of various materials is the physical quantity for characterizing matter-radiation ability, is an important physical parameter, very
It is multi-field to play an important role.For example, in national defence, be to missile tail flame, the cognition of the radiation characteristic of covering and
Early warning, stealthy key.For another example, in the fields such as using energy source, remote sensing, remote measurement, radiation temperature measurement, infrared heating, medical science physiotherapy
Also there is important application value.
In recent years, due to national defence, material, energy technology fast development, gas radiation characteristics are in increasing field
Occupy under critical positions, especially high temperature, hyperbaric environment.At present, for the radiation characteristic of mixed gas under high-temperature and high-pressure conditions
Aspect, has expanded substantial amounts of theoretical research, but also lacks the radiation characteristic progress to mixed gas under high-temperature and high-pressure conditions
The apparatus and method of research.
The content of the invention
(1) technical problem to be solved
In view of this, the present invention provides a kind of apparatus and method for measuring HTHP mixed gas radiation characteristic, is used to
Solve the above problems.
(2) technical scheme
A kind of device for measuring mixed gas radiation characteristic, including：
Air supply system, is mixed for providing a variety of single-component gas, and by a variety of single-component gas；
Heating system, including gas preheater and heating furnace, heating furnace are arranged on gas preheater and air supply system downstream；
Measuring system, including laser measuring device for measuring and experimental section, the experimental section are arranged on inside heating furnace, the experiment
Intersegmental part circulation has the mixed gas after preheating, and the mixed gas that heating furnace is used in Heating Experiment section, laser measuring device for measuring is used
In the radiation characteristic of mixed gas in measurement experiment section.
Preferably, the air supply system includes gas cylinder, steam generator and blender；
The gas cylinder is used to provide single-component gas, and gas cylinder and steam generator are connected to blender.
Preferably, the heating system includes：
Single-component gas preheater, is arranged between gas cylinder and blender, for preheating single-component gas；
Mixed gas preheater, is arranged on blender downstream, for preheating mixed gas；
Heating furnace, is arranged on mixed gas preheater downstream, for mixed gas in Heating Experiment section.
Preferably,
The air supply system includes at least two gas cylinders, and each gas cylinder connects a single-component gas branch road, the single group
Gas branch curb airflow direction is divided to be disposed with gas cylinder, pressure reducer, single-component gas preheater and flow controller；
Steam evaporator connects a vapor branch road, and the vapor branch curb airflow direction is disposed with water steaming
Gas generator and flow controller；
Convergence is a mixed gas pipeline in end for single-component gas branch road and vapor branch road, in the gas mixing pipe
It is gentle that along airflow direction check valve, blender, mixed gas preheater, experimental section, vavuum pump, stop valve are disposed with road
Body cooler.
Preferably, the laser measuring device for measuring includes laser, fibre-optical probe, optical signal receiver and spectrometer；
The laser is connected with fibre-optical probe, positioned at experimental section one end；Optical signal receiver is connected with spectrometer, is located at
The experimental section other end.
Preferably, the experimental section includes test cavity, sapphire glass, asbestos washer, external screw thread nut, supports, enters
Air pipe and outlet pipe；
The test cavity is hollow tubular structure, and inside heating furnace is filled in by support；
The test cavity two ends pass through sapphire glass, asbestos washer and external screw thread nut seal；
Air inlet and gas outlet are provided with the test cavity tube wall, the air inlet is used to make the mixed gas after preheating
Into test cavity, the gas outlet is used to adjust test cavity internal pressure.
A kind of method for measuring mixed gas radiation characteristic, using the device of above-mentioned measurement mixed gas radiation characteristic,
Comprise the following steps：
S1：Device is vacuumized, and measures the original spectrum characteristic under vacuum state；
S2：Measure single-component gas N2Spectroscopic data, be used as reference value；
S3：Shutoff device, repeats S1；
S4：The spectroscopic data of mixed gas is measured, and is analyzed with reference value.
Preferably,
The step S2 includes：
S21：Open wherein one single-component gas N2Single-component gas preheater, mixed gas preheater on branch road and
Heating furnace, and adjust temperature；
S22：The gas cylinder and pressure-reducing valve on the branch road are opened, flow control is flowed through after being preheated through single-component gas preheater
Device, check valve, blender and mixed gas preheater, into test cavity；
S23：Stove heat is heated to predetermined temperature, by testing cavity gas outlet regulation test cavity internal pressure to predetermined
Pressure, single-component gas N is measured by laser measuring device for measuring2Spectroscopic data, be used as reference value.
Preferably,
The step S4 includes：
S41：Open single-component gas preheater, mixed gas preheater and the heating on a plurality of single-component gas branch road
Stove, and adjust temperature；
S42：The gas cylinder and pressure-reducing valve on a plurality of single-component gas branch road, and vapor branch road are opened, gas enters
Enter blender to be mixed；
S43：Enter measurement cavity after the blended gas preheater preheating of mixed gas, be heated stove heat to predetermined
Temperature, is adjusted to predetermined pressure by gas outlet by cavity internal pressure is tested；
S44：Using laser measuring device for measuring measurement experiment section in mixed gas radiation characteristic, and with S2 obtain reference value
It is analyzed.
Preferably, the process of the radiation characteristic of gas is in laser measuring device for measuring measurement experiment section：
Open the double layer lens in laser, light regulating probe so that the hot spot that laser is sent penetrates measurement cavity；
Optical signal receiver light spot received, then collects spot signal in spectrometer, then stores to computer and carries out
Analysis, determines spectral characteristic.
(3) beneficial effect
The present invention provides a kind of apparatus and method for measuring HTHP mixed gas radiation characteristic, is obtained by air supply system
To mixed gas, measured after being passed through experimental section pressurized, heated to predetermined condition, simple in construction, measurement is accurate, and can
The radiation characteristic of gas under the conditions of accurate measurement different temperatures, pressure and component.
Brief description of the drawings
Fig. 1 is the high temperature and high pressure gas Radiation biodosimetry schematic device of the embodiment of the present invention.
Fig. 2 is the experimental section structural representation of the embodiment of the present invention.
Fig. 3 is the high temperature and high pressure gas Radiation biodosimetry method flow diagram of the embodiment of the present invention.
Fig. 4 is the spectroscopic data method flow diagram of the measurement single-component gas of the embodiment of the present invention.
Fig. 5 is the spectroscopic data method flow diagram of the measurement mixed gas of the embodiment of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in further detail.
First embodiment of the invention provides a kind of device for being used to measure mixed gas radiation characteristic under high-temperature and high-pressure conditions,
Fig. 1 is HTHP (20~1000 DEG C of the temperature range, pressure limit of the embodiment of the present invention：Normal pressure is to 10atm) gas radiation
Characteristic measuring device schematic diagram, as shown in figure 1, main by air supply system, heating system, pumped vacuum systems, measuring system, data
The part of acquisition and memory system five is constituted.
Air supply system includes：Gas cylinder, pressure reducer, check valve, steam evaporator and blender.In the present embodiment, gas
Bottle includes being single-component gas in the first gas cylinder and the second gas cylinder, two gas cylinders, and the first gas cylinder provides the first single-component gas
N2, the second single-component gas CO of the second gas cylinder offer2Or CO；Pressure reducer includes the first pressure reducer and the second pressure reducer, for reducing
Gas outlet pressure；Check valve is used to prevent reverse fluid flow；Steam evaporator is used to provide vapor；Blender is used for
Mix a variety of single-component gas.
Heating system includes：Gas preheater, mixed gas preheater, heating furnace.In the present embodiment, gas preheater
Including first gas preheater and second gas preheater, for preheating single-component gas；Mixed gas preheater is used to preheat
Mixed gas；The gas that heating furnace is used in Heating Experiment section.
Pumped vacuum systems includes：Vavuum pump.For being vacuumized when measuring and starting to whole device.
Measuring system includes laser measuring device for measuring and experimental section, and laser measuring device for measuring includes laser, fibre-optical probe, light letter
Number receiver and spectrometer.Laser is connected with fibre-optical probe, positioned at experimental section one end, optical signal receiver and spectrometer phase
Even, positioned at the experimental section other end.
Data acquisition storage system includes：Temperature sensor, pressure transmitter, flow controller, NI data collecting instruments.Stream
Amount controller includes first flow controller, second flow controller and the 3rd flow controller.
First gas cylinder, the second gas cylinder and steam evaporator connect a gas branch road, the first single-component gas branch respectively
Curb airflow direction is disposed with the first gas cylinder, the first pressure reducer, first gas preheater and first flow controller；Second
Single-component gas branch curb airflow direction is disposed with the second gas cylinder, the second pressure reducer, second gas preheater and second
Amount controller；Vapor branch curb airflow direction is disposed with steam evaporator and the 3rd flow controller.First single group
It is a mixed gas pipeline in end convergence to divide gas branch road, the second single-component gas branch road and vapor branch road, mixed at this
Close gas piping on along airflow direction be disposed with check valve, blender, mixed gas preheater, experimental section, vavuum pump, cut
Only valve and gas cooler, line end are provided with system exhaust, and experimental section is provided with heating furnace.
Fig. 2 is the experimental section structural representation of the embodiment of the present invention, as shown in Fig. 2 experimental section is placed on inside heating furnace,
Experimental section is by test cavity, sapphire glass, support, external screw thread nut, asbestos washer, air inlet and outlet pipe composition.Test
Cavity material is high temperature alloy, can bear 20~1100 DEG C of high temperature, and there is setting step at internal thread, screw thread cut-off at two.Step
It is sapphire glass on the outside of upper laying asbestos washer, asbestos washer, high-temperature seal adhesive is spread therebetween.Sapphire glass can be held
By 1100 DEG C of high temperature, and spectral-transmission favtor is higher.Sapphire glass is fixed by the externally threaded nut of outer side band.Support is set
In test containment portion, the strong point is uniformly distributed so that test cavity is completely filled in inside heating furnace.The laser of specific band
Device conveys optical signal to fibre-optical probe, and then inter-hole testing cavity, reaches optical signal receiver, and the signal of optical signal receiver is adopted
Collect in spectrometer, then store to computer and analyzed.Need to keep fibre-optical probe and optical signal receiver in same straight line
On.
In gas cylinder and steam evaporator exit arrangement flow controller, in gas test cavity import and export, arrangement
Temperature sensor and pressure transmitter.All temperature transmitter, pressure transmitter, flowmeter are connected to NI by signal wire
Data collecting instrument, dynamic acquisition temperature, pressure, flow signal.
Said apparatus is connected by 316L stainless steel pipes, and pipeline carries out parcel insulation by heat-preservation cotton, prevents heat
Scatter and disappear.
Second embodiment of the invention provides one kind and utilizes said apparatus to carry out HTHP mixed gas Radiation biodosimetry
Method, Fig. 3 is the high temperature and high pressure gas Radiation biodosimetry method flow diagram of the embodiment of the present invention, as shown in figure 3, including such as
Lower step：
S1：Measurement apparatus is vacuumized, and measures the original spectrum characteristic under vacuum state.
Step S1 is specifically included：
S11：Measurement apparatus is vacuumized.
Valve at gas cylinder and system exhaust is closed, then whole system is vacuumized by vavuum pump；
S12, opens gaseous spectrum measuring system, original spectrum characteristic is determined by measuring system.
Laser is opened, fibre-optical probe is connected with laser, the double layer lens in light regulating probe so that laser is sent out
The hot spot gone out is penetrated after the gasmetry cavity in vacuum state, is all received by optical signal receiver.Optical signal receiver
Signal acquisition in spectrometer, then store to computer and analyzed, determine original spectrum characteristic.Wherein, it is ensured that optical fiber is visited
Head and optical signal receiver are located on gasmetry chamber axis direction, keep straight line so that the light that fibre-optical probe is sent
Spot falls in the center of optical signal receiver after gasmetry cavity.2 convex lens are set before optical signal receiver, according to
The distance between fibre-optical probe and optical signal receiver, adjust the position of 2 convex lens so that the hot spot that optical fiber is sent is focused on
The center of optical signal receiver, improves measurement accuracy.
S2：Measure single-component gas N2Spectroscopic data, be used as reference value.
Fig. 4 is the spectroscopic data method flow diagram of the measurement single-component gas of the embodiment of the present invention, as shown in figure 4, including
Following sub-step：
S21：Open a single-component gas N2Single-component gas preheater, mixed gas preheater and heating on branch road
Stove, and adjust temperature.
The first single-component gas preheater and mixed gas preheater are opened, by the heating and temperature control of the two at 150 DEG C
Left and right, opens heating furnace, by the stable temperature in needs of in-furnace temperature, is up to 1100 DEG C.
S22：Open the first gas cylinder and pressure-reducing valve, required N2Gas from gas cylinder by gas preheater be preheated to 100 DEG C with
On, flow controller and check valve are then flowed through, into after blender and mixed gas preheater, cavity is measured into experiment.
S23：Stove heat is heated to the temperature (20~1000 DEG C) needed, cavity outlet valve is tested by closing, no
N is added disconnectedly2Test chamber pressure (normal pressure~10atm) is improved, is reached after predetermined temperature and pressure, now gaseous spectrum is obtained
Data, are used as reference value.
S3：Air supply system, heating system and measuring system are closed, S1 is repeated.
Keep after reference data, close data measurin system and heating system, and be vented experiment test section gas.So
Afterwards, the first step and second step are repeated.
S4：The spectroscopic data of mixed gas is measured, and is analyzed with reference value.
Fig. 5 for the embodiment of the present invention measurement mixed gas spectroscopic data method flow diagram, as shown in figure 5, including with
Lower sub-step：
S41：Open single-component gas preheater, mixed gas preheater and the heating on a plurality of single-component gas branch road
Stove, and adjust temperature.
The first component and the second component gas preheater and mixed gas heater are opened, three's heating and temperature control is existed
150 DEG C, heating furnace is opened, heating-up temperature in stove is stable within the temperature range of needs, 1100 DEG C of highest.
S42：The gas cylinder and pressure-reducing valve on above-mentioned a plurality of single-component gas branch road, and vapor branch road, gas are opened simultaneously
Body is mixed into blender.
Open the first and second gas cylinders and pressure-reducing valve, required gas from gas cylinder by gas preheater be preheated to 100 DEG C with
On；Steam evaporator is opened simultaneously, and the vapor of generation is by flow controller, into blender；Wherein, flowed by adjusting
Amount controller, adjusts the ratio of mixed gas each component.
S43：Enter measurement cavity after the blended gas preheater preheating of mixed gas, be heated stove heat to predetermined
Temperature, is adjusted to predetermined pressure by gas outlet by cavity internal pressure is tested.
After gas and vapor are mixed in blender, after blended gas preheater preheating, into gasmetry cavity,
Stove heat is heated to the temperature needed, by closing test cavity outlet valve, mixed gas is continually added and improves test
Chamber pressure.
The data of gasmetry cavity out temperature sensor and pressure transmitter are gathered by NI data collecting instruments, are reached
To after the temperature (20~1000 DEG C) and pressure (normal pressure to 10atm) for needing to test, gas cylinder and steam evaporator are closed.
S44：Using laser measuring device for measuring measurement experiment section in mixed gas radiation characteristic, and with S2 obtain reference value
It is analyzed.
Start measurement, by the signal acquisition of optical signal receiver to spectrometer, then store to computer, and by itself and the
The reference data of four pacing amounts is analyzed, and determines mixed gas absorption Spectrum characteristic, so as to release its radiation characteristic.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, it should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc. should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of device for measuring mixed gas radiation characteristic, including：
Air supply system, is mixed for providing a variety of single-component gas, and by a variety of single-component gas；
Heating system, including gas preheater and heating furnace, heating furnace are arranged on gas preheater and air supply system downstream；
Measuring system, including laser measuring device for measuring and experimental section, the experimental section are arranged in inside heating furnace, the experimental section
Portion's circulation has the mixed gas after preheating, and the mixed gas that heating furnace is used in Heating Experiment section, laser measuring device for measuring is used to survey
Measure the radiation characteristic of mixed gas in experimental section.
2. as claimed in claim 1 measurement mixed gas radiation characteristic device, wherein, the air supply system include gas cylinder,
Steam generator and blender；
The gas cylinder is used to provide single-component gas, and gas cylinder and steam generator are connected to blender.
3. the device of mixed gas radiation characteristic is measured as claimed in claim 1 or 2, wherein, the heating system includes：
Single-component gas preheater, is arranged between gas cylinder and blender, for preheating single-component gas；
Mixed gas preheater, is arranged on blender downstream, for preheating mixed gas；
Heating furnace, is arranged on mixed gas preheater downstream, for mixed gas in Heating Experiment section.
4. the device of mixed gas radiation characteristic is measured as claimed in claim 3, wherein,
The air supply system includes at least two gas cylinders, and each gas cylinder connects a single-component gas branch road, the one pack system gas
Body branch curb airflow direction is disposed with gas cylinder, pressure reducer, single-component gas preheater and flow controller；
Steam evaporator connects a vapor branch road, and the vapor branch curb airflow direction is disposed with vapor hair
Raw device and flow controller；
Convergence is a mixed gas pipeline in end for single-component gas branch road and vapor branch road, on the mixed gas pipeline
It is cold that check valve, blender, mixed gas preheater, experimental section, vavuum pump, stop valve and gas are disposed with along airflow direction
But device.
5. the device of mixed gas radiation characteristic is measured as claimed in claim 1, wherein, the laser measuring device for measuring includes swashing
Light device, fibre-optical probe, optical signal receiver and spectrometer；
The laser is connected with fibre-optical probe, positioned at experimental section one end；Optical signal receiver is connected with spectrometer, positioned at experiment
The section other end.
6. the device of the measurement mixed gas radiation characteristic as described in claim 1 or 5, wherein, the experimental section includes test
Cavity, sapphire glass, asbestos washer, external screw thread nut, support, air inlet pipeline and outlet pipe；
The test cavity is hollow tubular structure, and inside heating furnace is filled in by support；
The test cavity two ends pass through sapphire glass, asbestos washer and external screw thread nut seal；
Air inlet and gas outlet are provided with the test cavity tube wall, the air inlet is used to enter the mixed gas after preheating
Cavity is tested, the gas outlet is used to adjust test cavity internal pressure.
7. a kind of method for measuring mixed gas radiation characteristic, utilizes the measurement mixed gas described in any one of claim 1 to 6
The device of radiation characteristic, comprises the following steps：
S1：Device is vacuumized, and measures the original spectrum characteristic under vacuum state；
S2：Measure single-component gas N2Spectroscopic data, be used as reference value；
S3：Shutoff device, repeats S1；
S4：The spectroscopic data of mixed gas is measured, and is analyzed with reference value.
8. the method for mixed gas radiation characteristic is measured as claimed in claim 7, wherein,
The step S2 includes：
S21：Open wherein one single-component gas N2Single-component gas preheater, mixed gas preheater and heating on branch road
Stove, and adjust temperature；
S22：Open the gas cylinder and pressure-reducing valve on the branch road, through single-component gas preheater preheat after flow through flow controller,
Check valve, blender and mixed gas preheater, into test cavity；
S23：Stove heat is heated to predetermined temperature, by testing cavity gas outlet regulation test cavity internal pressure to pre- level pressure
Power, single-component gas N is measured by laser measuring device for measuring2Spectroscopic data, be used as reference value.
9. the method for mixed gas radiation characteristic is measured as claimed in claim 7, wherein,
The step S4 includes：
S41：Single-component gas preheater, mixed gas preheater and the heating furnace on a plurality of single-component gas branch road are opened, and
Adjust temperature；
S42：The gas cylinder and pressure-reducing valve on a plurality of single-component gas branch road, and vapor branch road are opened, gas enters mixed
Clutch is mixed；
S43：Enter measurement cavity after the mixed blended gas preheater preheating of gas, be heated stove heat to pre- constant temperature
Degree, is adjusted to predetermined pressure by gas outlet by cavity internal pressure is tested；
S44：Using the radiation characteristic of mixed gas in laser measuring device for measuring measurement experiment section, and the reference value progress obtained with S2
Comparative analysis.
10. the method for mixed gas radiation characteristic is measured as claimed in claim 8 or 9, wherein, laser measuring device for measuring measurement is real
The process for testing the radiation characteristic of gas in section is：
Open the double layer lens in laser, light regulating probe so that the hot spot that laser is sent penetrates measurement cavity；
Optical signal receiver light spot received, then collects spot signal in spectrometer, then stores to computer and is analyzed,
Determine spectral characteristic.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108458852A (en) * | 2018-05-24 | 2018-08-28 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of high-temperature tunnel quick changeable temperature potential device and alternating temperature voltage-transforming method |
| CN111111526A (en) * | 2019-12-12 | 2020-05-08 | 桂林理工大学 | Two-stage continuous mixed gas high-temperature heating system |
| CN112146846A (en) * | 2020-09-09 | 2020-12-29 | 黄宏琪 | Device and method for measuring performance of optical fiber at high temperature |
| CN113390807A (en) * | 2021-06-16 | 2021-09-14 | 桂林理工大学 | Simulation low carbon chemical combustion gas spectrum test system |
| CN114184741A (en) * | 2020-09-15 | 2022-03-15 | 中国计量科学研究院 | Controllable release device for monitoring and metering inorganization emission |
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| CN108458852A (en) * | 2018-05-24 | 2018-08-28 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of high-temperature tunnel quick changeable temperature potential device and alternating temperature voltage-transforming method |
| CN108458852B (en) * | 2018-05-24 | 2024-03-29 | 中国航空工业集团公司沈阳空气动力研究所 | Rapid temperature and pressure changing device and temperature and pressure changing method for high-temperature wind tunnel |
| CN111111526A (en) * | 2019-12-12 | 2020-05-08 | 桂林理工大学 | Two-stage continuous mixed gas high-temperature heating system |
| CN112146846A (en) * | 2020-09-09 | 2020-12-29 | 黄宏琪 | Device and method for measuring performance of optical fiber at high temperature |
| CN114184741A (en) * | 2020-09-15 | 2022-03-15 | 中国计量科学研究院 | Controllable release device for monitoring and metering inorganization emission |
| CN114184741B (en) * | 2020-09-15 | 2024-10-18 | 中国计量科学研究院 | Controllable release device for monitoring and metering unorganized emission |
| CN113390807A (en) * | 2021-06-16 | 2021-09-14 | 桂林理工大学 | Simulation low carbon chemical combustion gas spectrum test system |
| CN113390807B (en) * | 2021-06-16 | 2022-12-02 | 桂林理工大学 | Test system for simulating low-carbon chemical combustion gas spectrum |
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